Ruler



FIG. 1 is a top perspective view of a ruler showing my new design;

FIG. 2 is a cross-sectional view of FIG. 1 as taken from line 2--2;

FIG. 3 is a fragmentary bottom plan view of one end. The entire bottom is flat, plain and unornamented except for the longitudinal slot therein;

FIG. 4 is a typical side elevational view thereof;

FIG. 5 is a typical end elevational view thereof;

FIG. 6 is a top plan view thereof. 

The ornamental design for a ruler, substantially as shown and described. 